MDM设置
a) DND setting is set to NO
b) Block ANC Setting is set to NO
c) DND Activated is set to NO
d) SIP ALG is set to OFF
电话盒子设置:
1)网关 voip4.freephoneline.ca:6060
2)SIP settings,
-sane0898(大罗0898);
2021-11-18{132}(#14119584@0)
change SIP Port to 23599
3)NAT
a)Handle VIA received-->yes
b)Handle VIA rport-->yes
c)Substitute VIA Addr-->yes